zero lock, unlock more accurate and reliable. And when reading the card is valid, the pedestrians enter just gently push the turnstile can, automatic reset, two-way traffic, four door always in the off state, the revolving door each rotate 90 degrees. A unified, standard external electrical interface, can be connected with a variety of reading and writing equipment, easy system integration, and through the management of computer remote control and management. The whole system runs smoothly and the noise is small. 4 features,